Door for furnaces.



U. G. ATWATER. DPOR FOR FURNACES. APPLICATION mum nov. 14. 1906.

Patented Ju1y 27, 1909.

2 SHEETS-SHEET 1.

G. G. ATWATER.

DOOR FOR FURNACES.

APPLICATION rum NOV.14., 1906.

929,534, Patented July 27, 1909.

2 BHEETS-BHEBT Z.

Flu/0a x 1 tea the intensely hot gases developed within the I much has been lost in the constant renewals .a relatively inexpensive form of door capo UNITED STATES PATENT OFFICE.

CHRISTOPHER G. ATWATER, OF'FLUSI'IING, NEW YORK, ASSIGNOR TO THE UNITED COKE AND GAS COMPANY, A CORPORATION OF NEW JERSEY.

noon ron mmions.

Specification oi Letters Patent.

Pntented July 27, 1909.

Application filed November 14, 1906. Serial No. 848,489.

To all whom it may concern:

Be it known that I, CHRISTOPHER G. A'r- WATER, a citizen of the United States, residl ing "in Flushing, in the State of New York, l have invented a certain new and useful Improvement in Doors for Furnaces, of which the following is a s ecification.

This invention as relation to an improved form of door for use in closing any I ind of furnace wherein very high tem eratures are developed, and more particu ar-ly for by-product coke ovens, wherein the problem of providing a tight door without greet-t ex use is important to be solved.

ven when protected to some extent by a lining of fire brick, iron doors used on coke ovens invariably become distorted and warped after a relatively short exposure to ovens.v In the bee hive ovens and similar structures having smell openings, this warping or twisting is not fatal to successful operation. The doors bein r small, the openings due to the distortion in question are narrow and easily kept stopped by fire clay. Indeed in many cases temporary leakages stop themselves, usthe escaping gas leaves a sooty and tarry deposit in the interstices which ultimately c oses them completely.

tures, owever, the size of the opening is so eat that, when the doors become distorted v y heat, the resultin ga s are altogether too wide to be remedie cit ier by de )osit from escaping'gas or by wet fire-clay. iii-eat sums of money have been unsuccessfully-ex ended in the attempt to prevent these resu ts and necessitated by the conditions above dosaibed.

It is theobject of this invention to provide ble of use in closing by-product coke ovens and the like, which will remain tight for an indefinite period and is at the some time simple in operation and construction. The invention is illustrated in a preferred form in the accompanying drawings in l which Figure 1 is a front elevation of two coke l oven doors one of which is closed Fig. 2 is a horizontal section of the same on the line 2-2 in Fig. 1; Fig. 3 is a vertical section on the line 33 in F1 1; Fi 4 is a section of n modified form test ho e and Fi 5 is a sectional view of a modified form 0 flexible connection and Fi 6 is a. slightly enlarged view similar to Big. 4 and illustrating a scheme for preventing the leakage of gu from the coke oven.

In the drawings the door openings are supposed to be the full width of the ovens, the spaces within which are separated by the refractory Wu] ls 10. The front of each door opening is surrounded by an iron or steel frame 11. having an inner ridge 12 whose face forms a benrin for the door and preferably provided witi two outer and deeper ridges 13 which carry the railway rails 14 attached to them.

, The door proper is composed of a number [)iiSOcilOllH preferably of oust iron and preferably shaped substantially us shown, at 15, with an interior hollow uduptml to receive the lining i i of fire lu'irir or other refractory material. The door sections 15 are prefermy mudc tIHWltlO us the opening and their edges hear flat. upon the outer faces of the ridge 12 on each door frame. The door as a whole is made up of a plurality of these lined sections placed one over the other, as hovvn, and connected by uppro u'iutc menus which permit a certain limited amount of relative movement between successive sec- !ions. As a result of this construction, the distortion by heutof each section is limited to, that section only and corresponds in extent to the size of the section. In consequence there is no cumulative twist from top 0 bottom creating gaps of inordinate width around the door opening. A variety of flexi hi0 fastening means may be used in this conuection, all of which are within my invention. In illustration of this fact l have illustrated two diflcrcnt forms in the accompanying drawings. As shown in Fig. 3, the top of each section 15 is. provided with a transverse convex ridge 17, which loosely fits a corrcspoudilw transverse channel 18 in the lower edge of" the section immediately l i above. These are arranged to permit a certain limited rocking movement as well as a limited relative movement across each other of he ed es of successive sect' us. {The docare eld together by bolts" 9, whose hear are placed in the interior recesses of l the sections, the shanks projecting throu h th convex rid s 17 and passln uite loose i- 'ou h holes in the bottom 0 t e channel s and into chambers 20 in the faces of the next sections above. Within these chambers are securing wedges 21 which are driven through appropriate slots in the ends of the bolts 19.,

Another form of flexible connection equally within my invention is shown in Fig. 5 and involves a chamber contiguous to the ridge 17 at the top of a section as well as a chambernear the chamber 13 at the bottom of the next section. In this modification each chamber 20 surrounds an isolated por tion of the section-edge on three sides. Instead of a bolt 19 another form of securing means is used which enters both chambers 20, 20'. This is a link 22 of Wrought iron or mild steel bent around the isolated edge por tions as shown in Fig. 5.

When the door as a whole has been placed in position as shown in Figs. 1, 2 and 3, it is secured b a separate cross bar 23 for. each section. he ends of these bars are passed through appropriate holes in the sockets 24, which are in turn bolted between the pairs of railway rails 14 on each side of each door. edges 25 are then driven in between each bar and the door-section behind it, and closure of the door is completed.

To permit inspection of the contents of the oven and passage of tools for levelingctc. without openin the entire door and re leasing the char 'e, prefer to secure the top I section 15' to tie one beneath it by means i of hinges 26 ermittin saidsection to tilt outward at wi 1. It is t us very easy to gain access to the oven by simply removing the wedge 25 and bar 23 which serve to secure the top section alone. In Fig. 4 I have shown a modified form of opening which may be used if desired for this purpose. Here the to section, instead of being hin ed to its neigh or, is pierced to receive a ug 27, made preferably in the form of a hollow casting, as shown, and filled or lined with fire brick.

Where a fire door is made as thus described, in sections connected so as to permit limited relative movement, it will be very easy to keep the door ermanently tight by the use of wet fire clay aubed into the joints as shown at 30, Fig. 6 and, when necessary around the edges. The total distortion due to heat bein divided up among a number of sections, t e resulting gaps will be small and will either fill up automatically as above ridge of one loose] described, or can be quickly stopped up by small qu antities of soft clay.

Various changes can be made in this device without departing from my invention and I am not to be limited to the details herein shown and described.

What I claim is-.--

1. A furnace door comprising a plurality of sections; means for connectmg said sections together to thereby form a single unitary door, said connecting means being loose to thereby permiha limited relative movement of said sections with reference to one another; a frame-for said door; and means for securing each ofsaid sections to said frame.

2. A furnace door com rising a section with a transverse channe along its lower edge, a second section having a corresponding transverse convex rid e along its upper edge, loosely fitting said c annel and means connecting said sections and permitting limited relative movement between them, substantially as describcd.-

3. A furnace door comprising a number of sections connected to ether edge to edge by means ermitting a imited rocking movement of door, and means for securing each of said sections to said frame, substantially as described.

4. A furnace door comprising a plurality of sections each having a hollow or recess adapted to receive refractory material; means for loosely connecting said sections together to-lhercby form a single unitary door, whereby said connections ermit a limited relative movement of sai sections with reference to one another; a frame for said door; and means for securing each of said sections to said frame. j

5. A furnace door com rising sections having a hollow interior filed with refrac tory material and having a transverse convex ridgc'on one edge and a corres ondin transverse channel on the opposite e ge, sai sections being fastened together with the fittin the channel in the next, snbstantia ly as escribed.

6. A furnace door comprising two sections set edge to ed e a chamber near the edge of one section, a olt extending from the other. section into said chamber and securin means engaging said bolt within sai chamber, sai bolt being of-such a length that the sections are loosely connected togcther whereby they may move with reference to one another, substantially as 'described. I

7. A furnace door comprising two sections set edge to ed e, a chamber near the ed e of one section, a ol't having a slot in its en extending from the other section into said chamber and a wedge in said chamber driven one upon the other, a frame for said into the slot in the end of said bolt, eaid between them permitting liinited relative bolt being of such :1 length that the .SLCLIUHS movement and lire clay in the oints between are loosely connected together whereby they said sections, substantially as described.

may move with reference to one another, ()IIHI!'TUPHER G. A'IVVATER. substantially as described. \ritnesses:

8. A furnace door comprising a number of II. S. MACKAYE,

sections set edge to edge, connected means KATHRYN B. (hummus. 

